Simrad AP70 Installation Manual download pdf (Page 20)

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The operational modes | AP70/AP80 Operator Manual

The operational modes

Mode overview

The autopilot has several steering modes. Number of modes and features within the mode

depend on available input as shown below.

MODE FEATURE DESCRIPTION REQUIRED INPUT

STBY

Standby mode used when manually

steering at the helm. Compass and rudder

angle will be shown on the display

NFU

Non-Follow-Up steering where the rudder

movement is controlled by using the red

(port) or green (starboard) keys, or by

another NFU unit

Rudder feedback

Follow-up steering where the rudder

angle is set by the rotary knob or by

another FU unit

Rudder feedback

AUTO

Auto compass mode. Keeps the vessel on

set heading

Heading

capture

Aborts the turn and uses the

instantaneous compass reading as set

heading

Turn

(Pattern)

Moves the vessel automatically in pre-

deﬁ ned turn steering patterns

NoDrift

Automatic steering, keeping the vessel on

a straight bearing line by compensating

for drift

Heading, speed, position

Heading

capture

Aborts the turn and uses the

instantaneous compass reading as set

heading

NAV

Navigation steering. The vessel is steered

to a speciﬁ c waypoint location, or through

a route set on a chart plotter

Heading, speed, Cross

Track Distance (XTD)

and Bearing waypoint to

waypoint (BWW)

External system selector

An external switch can be used for controlling change over from manual to automatic

steering.

The mode descriptions in the following pages assumes that an external system selector has

opened for autopilot operation, or that no external selector is installed.

See “Using an external

switch to control autopilot

operation” on page 9 for

further information

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Simrad AP70 Installation Manual Page 20

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